We have two copies of an app, one running on SCO Unix, the modified version running on Linux. The SCO version depends upon the num-pad sending «esc»OS , however putting PuTTY into NumPad mode means all of the numpad keys send «esc» whatever so are useless for keying numbers (yes, I could remap them, in the Linux version, however a few features have not yet been ported enough to swap versions yet), so... Run PuTTY in numpad mode, download KeyTweak , remap the numpad keys to non-numpad keys, all functional!
Linux Advocate in Western Australia